hasOnValueSet

Template to determine if hook provides function called when value is set.

template hasOnValueSet (

Hook

) {

static if(__traits(hasMember, Hook, "onValueSet"))

enum hasOnValueSet;

static if(!(__traits(hasMember, Hook, "onValueSet")))

enum hasOnValueSet;

}

Members

Manifest constants

hasOnValueSet enum hasOnValueSet;: Undocumented in source.
hasOnValueSet enum hasOnValueSet;: Undocumented in source.

Examples

struct Hook {
    static int lastValue;
    static void onValueSet(T)(auto ref T val) { lastValue = val; }
}

static assert(hasOnValueSet!(Hook, int));
auto res = ok!(string, Hook)(42);
assert(res.hasValue);
assert(Hook.lastValue == 42);

hasOnValueSet

Members

Manifest constants

Examples

Meta

Source